Service Connector; Battery Connector - Nokia NSB-7 Series Service Manual

PAMS Technical Documentation
sory interface connector. DC connector has both jack and contact pads for desk stand.
Name Min
VIN 0
0
L_GND 0

Service Connector

Name Parameter
MBUS Serial clock from
the Prommer
FBUS_RX Serial data from the
Prommer
FBUS_TX Data acknowledge
to the Prommer
GND GND
The service connector is used as a flash programming interface for updating (i.e. re-pro-
gramming) the flash program memory and an electrical access for services to the engine.
When the flash prommer is connected to the phone supply power is provided through the
battery contacts and the phone is powered up with a pulse given to the BTEMP line.

Battery connector

The BSI contact on the battery connector is used to detect when the battery is to be
removed to be able to shut down the operations of the SIM card before the power is lost
if the battery is removed with power on. The BSI contact disconnects earlier than the
supply power contacts to give enough time for the SIM and LCD shut down.
Name Min
VBATT 3.0
BSI 0
Issue 1 06/00
Typ Max
12
850
0.3
Min Typ
0 logic low
2.0 logic low
0 logic low
2.0 logic high
0 logic low
2.0 logic high
0
Typ Max Unit
3.9 4.2 V
2.85 V
68 kohm
kohm
ãNokia Mobile Phones Ltd.
Unit Notes
V
mA
V
Max Unit Remark
0.8 V Prommer detection and Serial
2.85 Clock for synchronous communi-
cation
0.8 V Receive Data from Prommer to
2.85 Baseband
0.5 V Transmit Data from Baseband to
2.85 Prommer
0 V Ground
Notes
Battery voltage
Battery size indication
Phone has 100kohm pull-up resistor.
SIM Card removal detection
(Threshold is 2.4V@VBB=2.8V)
Battery indication resistor (BLB-2)
Battery indication resistor (service battery)
NSB-7
System Module
Page 11